package com.cn.web;

import com.cn.pojo.User;
import com.cn.service.UserService;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import java.io.IOException;

@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
    private UserService service = new UserService();
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //1.获取用户名和密码
        String username = req.getParameter("username");
        String password = req.getParameter("password");

        //获取复选框shuju
        String remember = req.getParameter("remember");

        //2.调用service查询
        User user = service.login(username, password);
        //3. 判断
        if(user != null){
            //判断用户是否勾选记住我，字符串写前面是为了避免出现空指针异常
            if("1".equals(remember)){
                //1.创建Cookie对象
                Cookie c_username = new Cookie("username", username);
                Cookie c_password = new Cookie("password", password);
                //2.设置Cookie的存活时间
                c_username.setMaxAge(60*60*24*7);
                c_password.setMaxAge(60*60*24*7);
                //3.发送
                resp.addCookie(c_username);
                resp.addCookie(c_password);
            }

            //将登录成功后的user对象，存储到 session;
            HttpSession session = req.getSession();
            session.setAttribute("user",user);
            String contextPath = req.getContextPath();
            resp.sendRedirect(contextPath+"/selectAllServlet");
        }else{
            // 登录失败,
            // 存储错误信息到request
            req.setAttribute("login_msg","用户名或密码错误");
            // 跳转到login.jsp
            req.getRequestDispatcher("/login.jsp").forward(req,resp);
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doGet(req, resp);
    }
}
